New version of Norton only updatedto 22.5.2.15 on one computer other one

Comcast provide Norton Security for 2 computer in the house.  I just noticed today that only one has updated to  22.5.2.15  the newer version of Norton Security. The computer I use every day is still at 21.7.0.11   It is a surprise to me, because the other computer is hardly ever used.   Will the update come by a patch or will automatically update itself? Any information would be well appreciated.